Koji SHIBATA


Importance Sampling for Turbo Codes over Slow Rayleigh Fading Channels
Takakazu SAKAI Koji SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/05/01
Vol. E95-A  No. 5  pp. 982-985
Type of Manuscript:  LETTER
Category: Coding Theory
Keyword: 
turbo codesimportance samplingfast simulationsimulation probability density functionRayleigh fading
 Summary | Full Text:PDF(191.4KB)

Fast Performance Evaluation Method of LDPC Codes
Takakazu SAKAI Koji SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/04/01
Vol. E94-A  No. 4  pp. 1116-1123
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
LDPC codesimportance samplingfast simulationtrapping setsimulation probability density function
 Summary | Full Text:PDF(550.5KB)

Fast Simulation Method for Turbo Codes over Additive White Class A Noise Channel
Takakazu SAKAI Koji SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/03/01
Vol. E94-A  No. 3  pp. 1034-1037
Type of Manuscript:  LETTER
Category: Coding Theory
Keyword: 
importance samplingclass A noisesimulation probability density functionMonte Carlo simulationturbo codes
 Summary | Full Text:PDF(185KB)

Precoder for Chip-Interleaved CDMA Using Space-Time Block-Coding
Yuji KIMURA Koji SHIBATA Takakazu SAKAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2885-2888
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Spectrum Technologies
Keyword: 
space-time block-codingchip-interleaved CDMAblock spreading
 Summary | Full Text:PDF(139.3KB)

A Blind Adaptive Decorrelating Detector Using Spatial Signature Estimation
Yuji KIMURA Koji SHIBATA Takakazu SAKAI Atsushi NAKAGAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/10/01
Vol. E89-A  No. 10  pp. 2686-2689
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Spread Spectrum
Keyword: 
blind adaptive decorrelating detectorantenna arrayspatial and temporal signature
 Summary | Full Text:PDF(394.9KB)

High-Speed MT Connector Assembly Method
Koji SHIBATA Masaaki TAKAYA Kazuo HOGARI Izumi SANKAWA Tadashi HAIBARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/02/01
Vol. E89-B  No. 2  pp. 413-418
Type of Manuscript:  PAPER
Category: Optical Fiber for Communications
Keyword: 
connectorsoptical fibersassemblyoptical communicationoptical components
 Summary | Full Text:PDF(1.1MB)

A Study on Importance Sampling for Turbo Codes
Takakazu SAKAI Koji SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/10/01
Vol. E87-A  No. 10  pp. 2503-2511
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
importance samplingMonte-Carlo simulationturbo codestrellis codingerror event simulation
 Summary | Full Text:PDF(874KB)

Importance Sampling for TCM Scheme over Fading Channel
Takakazu SAKAI Koji SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/10/01
Vol. E85-A  No. 10  pp. 2272-2275
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Communication Theory and Signals
Keyword: 
importance samplingMonte-Carlo simulationtrellis codingerror event simulationRayleigh fading
 Summary | Full Text:PDF(484.6KB)

A Two-Stage Approach with CMA and ILS to Blind Multiuser Detection
Go NAKANISHI Koji SHIBATA Takakazu SAKAI Atsushi NAKAGAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/10/01
Vol. E85-A  No. 10  pp. 2276-2279
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Spread Spectrum Technologies and Applications
Keyword: 
digital mobile communicationDS-CDMAblind multiuser detectionLCCM and ILS algorithms
 Summary | Full Text:PDF(452.2KB)

A Simulation Probability Density Function Design for TCM Scheme in Impulsive Noise Environment
Takakazu SAKAI Koji SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/10/25
Vol. E83-A  No. 10  pp. 1975-1978
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
importance samplingtrellis codingerror event simulationimpulsive noise
 Summary | Full Text:PDF(546.4KB)

Blind Channel Estimation for Time-Varying Frequency-Selective Fading Channels
Koji SHIBATA Takuma YAGI Takakazu SAKAI Atsushi NAKAGAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/10/25
Vol. E83-A  No. 10  pp. 1904-1913
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Mobile Communication
Keyword: 
mobile communicationblind channel estimationfrequency-selective fadingfinite alphabet property
 Summary | Full Text:PDF(1.4MB)

Performance Analysis of Trellis-Coded Partial Response CPM over Rician Fast Fading Channels
Yoshikatsu AKITA Koji SHIBATA Takakazu SAKAI Atsushi NAKAGAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/10/25
Vol. E82-A  No. 10  pp. 2204-2207
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Communication Systems
Keyword: 
trellis-codingpartial response continuous phase modulationfast fading
 Summary | Full Text:PDF(360.5KB)

Simulation Probability Density Function for TCM Scheme
Takakazu SAKAI Koji SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/10/25
Vol. E81-A  No. 10  pp. 2180-2183
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Coded Modulation/Security
Keyword: 
importance samplingtrellis codingnon-Gaussian noisetwisted distribution
 Summary | Full Text:PDF(257.1KB)

BER Performance Improvement of BPSK with Pilot Tone under Frequency-Selective Fading Using Diversity
Koji SHIBATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/02/25
Vol. E76-B  No. 2  pp. 187-195
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
BPSKpilot tonefrequency-selective fadingdiversity
 Summary | Full Text:PDF(585.3KB)

Postdetection Diversity Effects on 2-bit Differentially Detected GMSK with Cochannel Interference in Land Mobile Channel
Koji SHIBATA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/05/25
Vol. E73-E  No. 5  pp. 688-694
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
 Summary | Full Text:PDF(454.1KB)